Manhole opening inner cover and combined inner manhole cover and outer manhole cover device with same

Abstract

The invention relates to a manhole opening inner cover and a combined inner manhole cover and outer manhole cover device with the manhole opening inner cover. The manhole opening inner cover comprises an inner cover body installed in a race of a manhole cover. At least two cranked convex blocks are arranged on the circumference of the inner cover body at intervals, a rotating lock cylinder is arranged in the middle of the inner cover body and penetrates out of the middle of the inner cover body from top to bottom, a rotating shaft of the rotating lock cylinder is connected with a rotating disc below the inner cover body, at least two connecting rods are hinged to the circumference of the rotating disc at intervals, and horizontal telescopic sliding rods are hinged to the other ends of the connecting rods and penetrate out of the lower flange of the inner cover body. The inner cover can be prevented from being opened by a lawbreaker, and the combined inner manhole cover and outer manhole cover device can effectively prevent materials in a manhole.

Description

technical field [0001] The invention relates to a wellhead inner cover and a combined inner and outer well cover device. Background technique [0002] Manhole covers in the road are mainly used to cover the deep wells on the road. According to the different underground pipelines, some deep wells are used as water pipelines, line pipelines or gas pipelines. The setting of deep wells is conducive to the maintenance of pipelines. However, in some special cases Under heavy rain or human factors, the manhole cover is removed and people or objects fall into the deep well, or are jacked up by the impact of the internal pressure of the deep well. The emergence of these phenomena will bring huge safety hazards to people's travel. Simultaneously when well cover is used as cable, line conduit, often can take place the situation that unscrupulous person steals cable by removing well cover takes place, brings loss to state property. Contents of the invention [0003] The object of the...

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Problems solved by technology

[0002] Manhole covers in the road are mainly used to cover the deep wells on the road. According to the different underground pipelines, some deep wells are used as water pipelines, line pipelines or gas pipelines. The setting of deep wells is conducive to the maintenance of pipelines. However, in some special cases Under heavy rain or human factors, the manhole cover is removed and people or objects fall into the deep well, or are jacked up by the impact of the internal pressure of the deep well. These phenomena will bring huge safety hazards to people's travel.

At the same time, when the manhole cover is used as a cable and line pipeline, criminals often steal the cable by removing the manhole cover, which brings losses to national property.

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